论文标题
LS-DYNA中的RVE分析用于高保真多尺度建模
RVE Analysis in LS-DYNA for High-fidelity Multiscale Material Modeling
论文作者
论文摘要
在现代工程设计中，广泛使用了高级材料（例如，纤维/颗粒增强聚合物，金属合金，层状复合材料等），其中微观异质性（如谷物，夹杂物，空隙，微裂缝以及界面）显着影响了大型的构造行为。显然，对多尺度材料行为的准确描述对于材料设计和结构分析的成功至关重要。代表性体积元素（RVE）分析方法提供了一种严格的手段，以从材料成分和结构的性质以下长度尺度的特性获得均质的宏观材料特性。最近，我们在多物理模拟软件LS-DYNA中开发了一个RVE模块（关键字： *RVE_ANALSYS_FEM），以在用户指定的特征长度尺度上对数值重建的材料样品进行高效率虚拟测试。在本文中，将简要介绍此新功能。
In modern engineering designs, advanced materials (e.g., fiber/particle-reinforced polymers, metallic alloys, laminar composites, etc.) are widely used, where microscale heterogeneities such as grains, inclusions, voids, micro-cracks, and interfaces significantly affect the macroscopic constitutive behaviors. Obviously, an accurate description of the multiscale material behaviors is of great importance to the success of material design and structural analysis. The Representative Volume Element (RVE) analysis method provides a rigorous means to obtain homogenized macroscopic material properties at the upper length scale from the properties of the material constituents and structures at a lower length scale. Recently, we have developed an RVE module (keyword: *RVE_ANALYSIS_FEM) in the multiphysics simulation software LS-DYNA to enable high-fidelity virtual testing of numerically re-constructed material samples at user-specified characteristic length scales. In this article, a brief introduction to this new feature will be given.
